Skeletal Muscle Mass Index (SMMI): Age Trend
Median male SMMI falls from 8.95 kg/m² at age 40–44 to 8.37 by 65–69; female SMMI stays flat around 6.8 across the same span.
Data source: Lee et al. (UK Biobank SMMI) About this study
Skeletal Muscle Mass Index (SMMI) Body Composition Trend
skeletal muscle mass index SMMI skeletal muscle index SMI appendicular skeletal muscle mass ASMM sarcopenia muscle mass UK Biobank BIA trend aging norms normative data normative values reference values percentiles benchmarks reference ranges standards Skeletal Muscle Mass Index (SMMI) by Age Chart (kg/m2)
Skeletal Muscle Mass Index (SMMI) Median Values
| Age | Male (kg/m2) | Female (kg/m2) |
|---|---|---|
| 40-44 | 8.95 | 6.80 |
| 45-49 | 8.88 | 6.82 |
| 50-54 | 8.80 | 6.81 |
| 55-59 | 8.67 | 6.78 |
| 60-64 | 8.53 | 6.78 |
| 65-69 | 8.37 | 6.77 |